Traffic signal



Feb. 23, 1943. M. s. CAMPBELL TRAFFIC SIGNAL Filed June 21, 1941 2Sheets-Sheet 1 I m'mtor Feb. 23, 1943. M s CAMPBELL 2,312,074

TRAFFIC SIGNAL Filed Jun 21, 1941 2 sneet-speerz Invento'.

Attorney Patented Feb. 23, 1943 S PATENT OFFICE UNITED STATE 1 Claim.

The present invention appertains'to new and useful improvements intrafilc markers and signals and more particularly to a changeable signwhich can be used for giving special instruclower ends of the plate 8and through the slots I, I, and behind the plate these fingers 9, 9 arebridged by a bridge member In which has a bolt ll passing through theintermediate portion thereof. On the bolt H is a bearing sleeve I2 whichprojects through a slot 13 in an arm l4.

tions to motorists especially at certain hours of- 5 the day. Forinstance, no turns are permitted at The arm 14 is rockable on a fulcrummember l5 certain inter-sections during rush hours in a projectingrearwardly from the sign plate 5. number of large cities. However,during inter- Numeral l6 denotes a solenoid suitably mountvening hoursthere is no reason for not permited on the back of the plate 5 andhaving an arting such turns. Obviously, the sign may be mature arm llextending therefrom and pivotused with various other indicia such asNoally connected as at l8 tothe arm [4 below the O. K.Help Wanted, NoO,K.Parking, fulcrum point 15. A tension spring l9 extends etc. from theouter end of the arm I! to a suitable The present invention contemplatesan elecanchoring element 20 on the plate 5. trically operated changeablesign which can be Adjustable stops and 22 are provided on-the controlledeither from a policemans patrol box back of the plate 5 for the arm M.or from the usual traffic light controller box. Obviously when it isdesired that the sign read An important object of the invention is toprofrom No Turn to O. K. Turn, the solenoid vide a signal which will beclear in its designation I6 is controlled and thus shift the plate 8from and fully foolproof in operation. over the letter K to a positionover the letter Other objects and advantages of the invention N."Obviously, the spring i9 is intended to will become apparent to thereader of the followreturn the slide 8 after the solenoid becomes deingspecification. energized.

In the drawings: While the foregoing specification sets forth the Figure1 represents a front elevational view of 25 invention in specific terms,it is to be understood the sign with the parts manipulated to read Nohat n m s Changes in the p Size and Turn. materials may be resorted towithout departing FlgureZisafragmentary front elevational view from thespirit and scope of the invention as with the parts manipulated to read0. K. Turn." claimed hereinafter. Figure 3 is a fragmentary enlargedrear eleva- Having described the invention, what is claimed tional viewshowing the operating mechanism. as new is:

Figure 4 is a fragmentary Vertical SectiOYlal A changeable signcomprising a plate havin View through a e par o e S a pair of lettersymbols on one side thereof letter Figure 5 is a fr m ary h r onta onaspaced apart. said plate having a'pair of hori- VieW taken u st a ly 0he e 5- of Fig- 5 zontal guide slots therein above and below said urepair of symbols. respectively, a slide on said side 7 Figure 6 is aperspective view of the slide. of the plate having a pair of top andbottom .Referring to, the drawings wherein like nuguide fingersextending through said slots wheremerals designate like parts, it can beseen that by said slide is adjustable in opposite directions numeral 5denotes a sign plate having a suitable 40 into and from coveringrelation to either symbol frame form 6 bordering the same. At a suitableof said pair. said slide having on its outer face i point or on asuitable area of this sign plate 5 a letter symbol complemental toeither letter symis indicia preferably reading Turn." Above this bol ofsaid pair whereby when the slide is adjusted word the plate 5 is formedwith a pair of horiinto covering relation to either symbol of the pair,zontally disposed and spaced parallel slots I, 1 the uncovered symbol ofthe pair and-the symbol and described on this area of the plate 5between on the slide will compose letter signals having the slots arethe letters "N and K. Slidable different meanings, and means on theother side across the letters N and K is a plate 8 havof said plate foradjusting said slide including an ing the letter 0 described thereon. Apair of electro-magnetically operative lever connected to fingers 9project rearwardly from the upper and said pa of fin er MACEO S.CAMPBELL.

